You can use the same principles from the second Utility Texture baking video. Although you’ll want to bake the blemish texture output instead of the pointiness:
- Plug your final blemish texture output into the material Viewer node (now it also works by plugging directly into material output surface socket).
- Create a new image texture node and create a new blank image texture at the resolution you prefer (probably needs to be 2048×2048 at least to capture details)
- Select the image texture node and bake the emission data in the Cycles “Baking” settings.
- Save your newly baked image texture to your hard drive before you forget!